A group of people are collaborating in the comparison experimental thermal diffusivities
inferred from experimental data measured in the edge pedestal of DIII-D H-mode discharges
using different codes. I am providing calculations based on a 1D edge transport code (as described in section II and Ref. 1), Rich Groebner (General Atomics) is providing calculations
based on the 1.5D transport/MHD code ONE-TWO2, Tarig Rafiq (Lehigh) is providing
calculations based on the Multimode transport model in the 1.5D transport/MHD code ASTRA3,
Tom Rognlien (Lawrence Livermore National Laboratory) is providing calculations based on the
2D transport code UEDGE4, and Larry Owen and John Canick (Oak Ridge National Laboratory)
are providing calculations based on the 2D transport code SOLPS5. Jim Callen (Wisconsin) is
coordinating the activity.